Welcome to the grand world of bicycle collecting, fellows. It is easy to get hooked - I sure am.
The Bowden Spacelander is one of the neatest of the Space-age era bicycles. It is also the most valuable. There are only 61 known in existance. It was manufactured only for one year; 1964.
If you want a Space-age design bike at a more reasonable price, look at some of the early 1950's bikes made by Murray such as the Cosmic Flyer, Sonic Flight, Hiawatha, and others. Also see the Sears Spaceliner made by Murray in the early 1960's (mostly 1963 and 1964).
The Murray Space-agers cost from several hundred dollars and top our at around $1,200; still much less than the Bowden Spacelander which cost in the tens of thousands of dollars.